widest tire for rear 68 cuda

Butting in here... when you folks are saying you have these huge tires on the rear, is that at stock ride height, or is the back raised up?

Or to get to my question, how wide a 14" tire can you run at stock ride height, front or rear? How about 1" lowered? I got a set of vintage 14 x 7 Torquethrusts, and I was thinking 245/60-14. But I like a lower stance.